US3269140A - Temperature sensitive valve arrangement - Google Patents

Temperature sensitive valve arrangement Download PDF

Info

Publication number
US3269140A
US3269140A US381770A US38177064A US3269140A US 3269140 A US3269140 A US 3269140A US 381770 A US381770 A US 381770A US 38177064 A US38177064 A US 38177064A US 3269140 A US3269140 A US 3269140A
Authority
US
United States
Prior art keywords
valve
movement
arrangement
fluid
valve seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US381770A
Inventor
Eugene W Peterson
Michael J Nagy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Co
Original Assignee
Santa Barbara Research Center
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Santa Barbara Research Center filed Critical Santa Barbara Research Center
Priority to US381770A priority Critical patent/US3269140A/en
Priority to SE4524/65A priority patent/SE300741B/xx
Application granted granted Critical
Publication of US3269140A publication Critical patent/US3269140A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/12—Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid
    • G05D23/125—Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow
    • G05D23/126—Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid the sensing element being placed outside a regulating fluid flow using a capillary tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0338—Pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0443—Flow or movement of content
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0636—Flow or movement of content
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/02—Gas cycle refrigeration machines using the Joule-Thompson effect
    • F25B2309/022—Gas cycle refrigeration machines using the Joule-Thompson effect characterised by the expansion element

Definitions

  • This invention relates to a temperature sensitive valve arrangement for control of fluid flow and particularly to a valve which regulates the flow of cryogenic fluids required to maintain a desired cryogenic temperature.
  • this invention provides and improves flow control valve for efficiently regulating the flow of fluids, particularly cryogenic fluids.
  • the arrangement according to this invention is characterized by a combination comprising a valve body having a valve seat member slidably mounted therein and a poppet valve slidable within a cavity in the valve seat member.
  • a loaded coiled spring is compressively interposed between the body and valve seat member to bias the latter in one direction and the opposed end of the valve seat member is engaged by a bellows device pressure responsive to temperature variation. bellows opposes the biasing of the coiled spring and, accordingly, the poppet valve is variably opened to allow fluid flow in response to the heat load impinging on the bellows.
  • the invention is particularly directed to the controlled flow of a fluid which has been cooled to cryogenic temperatures and which has as its ultimate object the cooling of a device which provides optimum operation at a specific cryogenic temperature level.
  • the valve of the disclosed invention being temperature responsive, both meter the flow of the cryogenic fluid and be controlled by the temperature level thereof.
  • the fluid being metered acts as the controlling agent in temperature level determination which thus controls the metering.
  • FIG. 1 is a longitudinal sectional view showing the valve arrangement of this invention enlarged about twenty times;
  • FIG. 2 is a side elevational view, drawn to an enlarged scale, of a valve seat member of the arrangement shown in FIG. 1;
  • FIG. 3 Motion of the FIG. 3 is an end view of the valve seat member of FIG. 2 taken along line 3-3;
  • FIG. 4 is an end view, drawn to an enlarged scale, of a spider retainer of the arrangement shown in FIG. 1.
  • the arrangement shown provides a slide valve which is spring-loaded for movement in one direction and gas pressure loaded for movement in the opposite direction to smoothly open or close the valve for regulating the flow of cryogenic fluids to an infrared radiation detector cell and for maintaining the latter at a predetermined cryogenic temperature.
  • valve seat member 10 is slidably mounted in a valve body 11, and a poppet valve 12 is slidably mounted in the valve seat member 10.
  • One end of the valve seat member 1i) bears against a loaded coil spring 13 mounted in the valve body 11 and bearing against an adjusting screw 24 threaded into the valve body 11.
  • the spring 13 is mounted around a valve input tube 14 extending through an aperture in the screw 24 and communicating with the inside of valve seat member 10, as shown.
  • the other end of valve seat member It bears against a slidably mounted piston 16 through a spider 17
  • the piston 16 in turn, bears against a gas-filled, sealed bellows 18.
  • the bellows 1 8 is retained against outward movement by a retainer 1 9 adjustab-ly threaded into the valve body 11.
  • the spider 17 is retained against outward movement by a spider retainer 21 threaded into the valve body 11.
  • a sealed fill tube 22 extends through retainer 19 into the bellows 1 8.
  • a valve exhaust 23 is formed through the valve body 11 and through the valve seat member 10 to communicate with the inside of the valve seat member 10 adjacent a valve seat 20 and a needle portion 1 5 of the poppet valve 12.
  • the needle portion 15 is adapted to seat in the valve seat 20.
  • the valve seat 20 is circular and has a sharp seating edge for the needle portion 15 which is conical.
  • a cryostat heat exchanger coil 25 is spirally wound around the valve assembly to supply cold gas to the valve input tube 14 from the cryostat.
  • the upper three turns of the coil 25 are loose so that the input tube 14 can move up and down with the valve seat member 10 which is integral with the input tube 14.
  • the valve as shown in the drawing, is in the open position taken at the higher temperature situation.
  • the pressure of the gas sealed in bellows 18 is relatively high, causing the bellows to expand.
  • EX- panding bellows 18 presses against piston 16 which, in turn, presses against valve seat member 10 pushing the valve seat member through spider 17 against loaded spring 13 so that poppet valve 12 is free to move away from the valve seat 20 under the pressure of incoming cold gas from the input tube 14.
  • the needle portion 15 of the poppet valve 12 unseats from the valve seat 20
  • cold gas from the input tube 14 passes through the valve exhaust 23 to the detector cell (not shown) and cools it below the cryogenic temperature at which it is desired to maintain it.
  • the valve operates smoothly and reliably as it closes and opens to an extent depending upon the force balance between loaded spring 13, tending to close the valve, and the gas pressure in bellows 18, tending to open the valve.
  • the pressure of the gas in bellows 18, in turn, depends upon the cryogenic temperature in the vicinity of the valve and detector cell, or other element being maintained at a substantially constant, desired, low temperature. Near the liquefaction point of the cryogenic gas, the differential pressure effect is most 1 pronounced and the valve is thus most sensitively controlled when the temperature desired to maintain constant is near the liquefaction temperature of the gas in bellows 18.
  • the valve of this invention can be used to efiiciently supply cryogenic fluid from a supply thereof to each of one or more cryostats.
  • the valves to each cryostat serve to divide the gas flow among the cryostats in accordance to their need. Without such control, the coldest unit gets the largest amount of gas.
  • valve of this invention can be installed within the cryostat and thereby, conserve gas. It is much more efficient to use such a valve than to use a pressure regulator in preventing overcooling and waste of gas.
  • said fluid having a temperature level in the cryogenic range
  • a valve body member and a valve seat member mounted for movement relative to each other, a poppet valve carried by the members and movable :relative to the valve seat member, the flow of fluid through the arrangement being responsive to the last-mentioned relative movement, spring means compressively interposed between the members and normally biasing same for movement relative to each other in one direction, an expansion and contraction device in pressured interposition between said members, said device being subject to expanding and contracting movements in response to the departure thereof from a determined temperature level, the expansion movement of said device being in opposition to said one direction movement between the members and the contraction movement of said device being complementary to said one direction movement between the members,
  • said heat transfer means comprises transfer tubing for carrying the fluid at cryogenic temperatures
  • said transfer tubing comprises a plurality of coils surrounding the valve body member and in thermal transfer relation with said expansion and contraction device.
  • expansion and contraction device is a sealed bellows having a determined volume of the cryogenic fluid encapsulated therein
  • tubing is integrally formed with said inlet port means
  • said inlet port means being movable with said one of said members
  • tubing coils being flexible to accommodate relative movement between said members.
  • a temperature sensitive valve for flow control of gas in an expanded gas refrigerator which comprises an elongate valve body including aligned oppositely projecting portions, a valve seat member slidably mounted in the valve body, an inlet port communicating with the valve seat member, a poppet valve member slidably mounted in the valve seat member, a loaded spring means mounted in one of the projecting portions of the valve body and bearingupon the valve seat member, adjustment means for setting the load upon the spring means, compressed bellows means mounted in the other projecting portion of the valve body and bearing upon the valve seat member in opposition to the loaded spring means, a valve seat carried by the valve seat member and comprising the terminal portion of the inlet port, a needle formed on the poppet valve member for seating in the seat, the forces of the spring means and the bellows means being substantially balanced in opposi- References Cited by the Examiner UNITED STATES PATENTS 5/1950 Lindgren 236-99 9/1957- Angelery 23699 MEYER PERLIN, Primary Examiner,

Description

g 30, 1956 E. w. PETERSON ETAL TEMPERATURE SENSITIVE VALVE ARRANGEMENT 2 Sheets-Sheet 1 Filed July 10, 1964 g- 30, 1966 E. w. PETERSON ETAL 3,269,140
TEMPERATURE SENSITIVE VALVE ARRANGEMENT Filed July 10, 1964 2 Sheets-Sheet 2 aw KW m. M
United States Patent Ofiice 3,269,149 Patented August 30, 1966 3,269,140 TEMPERATURE SENSITIVE VALVE ARRANGEMENT Eugene W. Peterson and Michael .li. Nagy, Santa Barbara,
Calif., assignors to Santa Barbara Research Center,
Goleta, Calif., a corporation of California Filed July 10, 1964, Ser. No. 381,770 6 Claims. (Cl. 62223) This invention relates to a temperature sensitive valve arrangement for control of fluid flow and particularly to a valve which regulates the flow of cryogenic fluids required to maintain a desired cryogenic temperature.
Reliability, small size and low weight are very important in airborne refrigeration systems employing gas expansion cryostats. In airborne infrared detector systems, for example, it is necessary to maintain the detector at a narrow range of cryogenic temperatures without wasting refrigerant. Excessive flow of refrigerant also should be avoided to minimize cryostat noise generated by such flow and the refrigerant should be smoothly throttled to stabilize the temperature of the detector for more accurate and precise measurements of infrared radiation.
Accordingly, this invention provides and improves flow control valve for efficiently regulating the flow of fluids, particularly cryogenic fluids.
The arrangement according to this invention is characterized by a combination comprising a valve body having a valve seat member slidably mounted therein and a poppet valve slidable within a cavity in the valve seat member. A loaded coiled spring is compressively interposed between the body and valve seat member to bias the latter in one direction and the opposed end of the valve seat member is engaged by a bellows device pressure responsive to temperature variation. bellows opposes the biasing of the coiled spring and, accordingly, the poppet valve is variably opened to allow fluid flow in response to the heat load impinging on the bellows. Specifically, as the bellows is warmed from a determined temperature level, it expands and pressure moves the valve seat member against the biasing action of the coiled spring to accommodate valve opening and increased fluid flow. Alternately, as the bellows loses heat it is physically contracted and the action of the coiled spring against the valve seat member biases the latter in the direction of closed position and flow through the arrangement is diminished.- The invention is particularly directed to the controlled flow of a fluid which has been cooled to cryogenic temperatures and which has as its ultimate object the cooling of a device which provides optimum operation at a specific cryogenic temperature level. To maintain the device at that specific level, it is desirable to carefully meter the flow of cryogenic fluid thereto so that the heat dissipated by the device is carefully balanced by the amount of fluid which vaporizes as a result of thermal transfer from the load. Accordingly, it is desirable that the valve of the disclosed invention, being temperature responsive, both meter the flow of the cryogenic fluid and be controlled by the temperature level thereof. Thus, a particular feature of this invention is that the fluid being metered acts as the controlling agent in temperature level determination which thus controls the metering.
The invention will be described hereinafter by way of example and with reference to the accompanying drawing, wherein:
FIG. 1 is a longitudinal sectional view showing the valve arrangement of this invention enlarged about twenty times;
FIG. 2 is a side elevational view, drawn to an enlarged scale, of a valve seat member of the arrangement shown in FIG. 1;
Motion of the FIG. 3 is an end view of the valve seat member of FIG. 2 taken along line 3-3; and
FIG. 4 is an end view, drawn to an enlarged scale, of a spider retainer of the arrangement shown in FIG. 1.
The arrangement shown provides a slide valve which is spring-loaded for movement in one direction and gas pressure loaded for movement in the opposite direction to smoothly open or close the valve for regulating the flow of cryogenic fluids to an infrared radiation detector cell and for maintaining the latter at a predetermined cryogenic temperature.
As shown in the drawings, a valve seat member 10 is slidably mounted in a valve body 11, and a poppet valve 12 is slidably mounted in the valve seat member 10. One end of the valve seat member 1i) bears against a loaded coil spring 13 mounted in the valve body 11 and bearing against an adjusting screw 24 threaded into the valve body 11. The spring 13 is mounted around a valve input tube 14 extending through an aperture in the screw 24 and communicating with the inside of valve seat member 10, as shown. The other end of valve seat member It bears against a slidably mounted piston 16 through a spider 17 The piston 16, in turn, bears against a gas-filled, sealed bellows 18. The bellows 1 8 is retained against outward movement by a retainer 1 9 adjustab-ly threaded into the valve body 11. The spider 17 is retained against outward movement by a spider retainer 21 threaded into the valve body 11. A sealed fill tube 22 extends through retainer 19 into the bellows 1 8. A valve exhaust 23 is formed through the valve body 11 and through the valve seat member 10 to communicate with the inside of the valve seat member 10 adjacent a valve seat 20 and a needle portion 1 5 of the poppet valve 12. The needle portion 15 is adapted to seat in the valve seat 20. The valve seat 20 is circular and has a sharp seating edge for the needle portion 15 which is conical. A cryostat heat exchanger coil 25 is spirally wound around the valve assembly to supply cold gas to the valve input tube 14 from the cryostat. The upper three turns of the coil 25 are loose so that the input tube 14 can move up and down with the valve seat member 10 which is integral with the input tube 14.
The valve, as shown in the drawing, is in the open position taken at the higher temperature situation. In this situation the pressure of the gas sealed in bellows 18 is relatively high, causing the bellows to expand. EX- panding bellows 18 presses against piston 16 which, in turn, presses against valve seat member 10 pushing the valve seat member through spider 17 against loaded spring 13 so that poppet valve 12 is free to move away from the valve seat 20 under the pressure of incoming cold gas from the input tube 14. As the needle portion 15 of the poppet valve 12 unseats from the valve seat 20, cold gas from the input tube 14 passes through the valve exhaust 23 to the detector cell (not shown) and cools it below the cryogenic temperature at which it is desired to maintain it.
At this stage the lower temperature situation is brought about and the pressure of the gas sealed in the bellows 18 is relatively low, causing the bellows to contract under the compressive force of loaded spring 13 acting .through the valve seat member 10 and piston 16. The valve seat member 11) is moved toward the spider 17 until the poppet valve 12 is held tightly between the spider 17 and the valve seat 20. As the needle portion 15 of the poppet valve 12 seats in the valve seat 20, the flow of cold gas through the valve exhaust 23 is shut off. With the flow of cold gas shut off to the detector cell a warming condition sets in. As the warming trend continues, the pressure of the gas sealed in the bellows 18 increases and the abovedescribed cycle of events is repeated. As a result, a narrow, constant cryogenic temperature range at the detector cell is maintained.
It will be seen that the valve operates smoothly and reliably as it closes and opens to an extent depending upon the force balance between loaded spring 13, tending to close the valve, and the gas pressure in bellows 18, tending to open the valve. The pressure of the gas in bellows 18, in turn, depends upon the cryogenic temperature in the vicinity of the valve and detector cell, or other element being maintained at a substantially constant, desired, low temperature. Near the liquefaction point of the cryogenic gas, the differential pressure effect is most 1 pronounced and the valve is thus most sensitively controlled when the temperature desired to maintain constant is near the liquefaction temperature of the gas in bellows 18.
By properly choosing the gas sealed in bellows 18 and the spring constant of spring 13' the controlled temperature range can be adjusted. Adjusting screw 24 is et to balance the force of spring 13 against that of bellows 18 on valve seat- 15 at the selected temperature. The position of bellows retainer 119 is adjusted so that empty bello-ws 18 is just slightly compressed. Bellows 18 is not strong enough toretain fill pressure unless its length is restricted. Spider 17 serves to hold poppet valve 12 against valve seat 15 when the pressure of bellows 18 is low. Poppet valve 12 is captured between valve seat member 14 and spider 17, the force being supplied by spring 13.
The valve of this invention can be used to efiiciently supply cryogenic fluid from a supply thereof to each of one or more cryostats. In the case of more than one cryostat, the valves to each cryostat serve to divide the gas flow among the cryostats in accordance to their need. Without such control, the coldest unit gets the largest amount of gas.
Many laboratory cryostats employ tanked cryogenic gases. In such laboratory cryostats, the valve of this invention can be installed within the cryostat and thereby, conserve gas. It is much more efficient to use such a valve than to use a pressure regulator in preventing overcooling and waste of gas.
Obviously many other modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood that within the scope of the appended claims the invention can be practiced otherwise than as specifically described.
What is claimed is: 1. In a temperature-sensitive valve arrangement for volumetric control of fluid flow therethrough,
said fluid having a temperature level in the cryogenic range, the combination of a valve body member and a valve seat member mounted for movement relative to each other, a poppet valve carried by the members and movable :relative to the valve seat member, the flow of fluid through the arrangement being responsive to the last-mentioned relative movement, spring means compressively interposed between the members and normally biasing same for movement relative to each other in one direction, an expansion and contraction device in pressured interposition between said members, said device being subject to expanding and contracting movements in response to the departure thereof from a determined temperature level, the expansion movement of said device being in opposition to said one direction movement between the members and the contraction movement of said device being complementary to said one direction movement between the members,
fluid inlet and outlet port means communicating with the arrangement,
and heat transfer means in direct thermal communication with the arrangement to vary the temperature level of the expansion and contraction device above and below said determined level and thereby control the flow of fluid through the arrangement.
2. A temperature-sensitive valve arrangement according to claim 1,
wherein said heat transfer means comprises transfer tubing for carrying the fluid at cryogenic temperatures,
one terminal of said transfer tubing communicating directly with said inlet port means.
3. A temperature-sensitive valve arrangement according to claim 2,
wherein said transfer tubing comprises a plurality of coils surrounding the valve body member and in thermal transfer relation with said expansion and contraction device.
4. A temperature-sensitive valve arrangement according to claim 3,
wherein said expansion and contraction device is a sealed bellows having a determined volume of the cryogenic fluid encapsulated therein,
5. A temperature-sensitive valve arrangement according to claim 4,
wherein said tubing is integrally formed with said inlet port means,
said inlet port means being movable with said one of said members,
certain of said tubing coils being flexible to accommodate relative movement between said members.
6. A temperature sensitive valve for flow control of gas in an expanded gas refrigerator which comprises an elongate valve body including aligned oppositely projecting portions, a valve seat member slidably mounted in the valve body, an inlet port communicating with the valve seat member, a poppet valve member slidably mounted in the valve seat member, a loaded spring means mounted in one of the projecting portions of the valve body and bearingupon the valve seat member, adjustment means for setting the load upon the spring means, compressed bellows means mounted in the other projecting portion of the valve body and bearing upon the valve seat member in opposition to the loaded spring means, a valve seat carried by the valve seat member and comprising the terminal portion of the inlet port, a needle formed on the poppet valve member for seating in the seat, the forces of the spring means and the bellows means being substantially balanced in opposi- References Cited by the Examiner UNITED STATES PATENTS 5/1950 Lindgren 236-99 9/1957- Angelery 23699 MEYER PERLIN, Primary Examiner,

Claims (1)

1. IN A TEMPERATURE-SENSITIVE VALVE ARRANGEMENT FOR VOLUMETRIC CONTROL OF FLUID FLOW THERETHROUGH, SAID FLUID HAVING A TEMPERATURE LEVEL IN THE CRYOGENIC RANGE, THE COMBINATION OF A VALVE BODY MEMBER AND A VALVE SEAT MEMBER MOUNTED FOR MOVEMENT RELATIVE TO EACH OTHER, A POPPET VALVE CARRIED BY THE MEMBERS AND MOVABLE RELATIVE TO THE VALVE SEAT MEMBER, THE FLW OF FLUID THROUGH THE ARRANGEMENT BEING RESPONSIVE TO THE LAST-MENTINED RELATIVE MOVEMENT, SPRING MEANS COMPRESSIVELY INTERPOSED BETWEEN THE MEMBERS AND NORMALLY BIASING SAME FOR MOVEMENT RELTIVE TO EACH OTHER IN ONE DIRECTION, AN EXPANSION AND CONTRACTION DEVICE IN PRESSURED INTERPOSITION BETWEEN SAID MEMBERS, SAID DEVICE BEING SUBJECT TO EXPANDING AND CONTRACTING MOVEMENTS IN RESPONSE TO THE DEPARTURE THEREOF FROM A DETERMINED TEMPERATURE LEVEL, THE EXPANSION MOVEMENT OF SAID DEVICE BEING IN OPPOSITION TO SAID ONE DIRECTION MOVEMENT BETWEEN THE MEMBERS AND THE CONTRACTION MOVEMENT OF SAID DEVICE BEING COMPLEMENTARY TO SAID ONE DIRECTION MOVEMENT BETWEEN THE MEMBERS, FLUID INLET AND OUTLET PART MEANS COMMUNICATING WITH THE ARRANGEMENT, AND HEAT TRANSFER MEANS IN DIRECT THERMAL COMMUNICATION WITH THE ARRANGEMENT TO VARY THE TEMPERATURE LEVEL OF THE EXPANSION AND CONTRACTION DEVICE ABOVE AND BELOW SAID DETERMINED LEVEL AND THEREBY CONTROL THE FLOW OF FLUID THROUGH THE ARRANGEMENT.
US381770A 1964-07-10 1964-07-10 Temperature sensitive valve arrangement Expired - Lifetime US3269140A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US381770A US3269140A (en) 1964-07-10 1964-07-10 Temperature sensitive valve arrangement
SE4524/65A SE300741B (en) 1964-07-10 1965-04-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US381770A US3269140A (en) 1964-07-10 1964-07-10 Temperature sensitive valve arrangement

Publications (1)

Publication Number Publication Date
US3269140A true US3269140A (en) 1966-08-30

Family

ID=23506290

Family Applications (1)

Application Number Title Priority Date Filing Date
US381770A Expired - Lifetime US3269140A (en) 1964-07-10 1964-07-10 Temperature sensitive valve arrangement

Country Status (2)

Country Link
US (1) US3269140A (en)
SE (1) SE300741B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413819A (en) * 1966-05-09 1968-12-03 Hughes Aircraft Co Flow rate control for a joule-thomson refrigerator
US3457730A (en) * 1967-10-02 1969-07-29 Hughes Aircraft Co Throttling valve employing the joule-thomson effect
FR2165920A1 (en) * 1971-12-06 1973-08-10 Air Prod & Chem
FR2377588A1 (en) * 1977-01-13 1978-08-11 Hymatic Eng Co Ltd CRYOGENIC COOLING UNIT
US4152903A (en) * 1978-04-13 1979-05-08 Air Products And Chemicals, Inc. Bimaterial demand flow cryostat
FR2558938A1 (en) * 1984-01-26 1985-08-02 Hymatic Eng Co Ltd CRYOGENIC COOLING APPARATUS
US5548963A (en) * 1995-06-08 1996-08-27 Hughes Missile Systems Company Joule-Thompson cryostat for use with multiple coolants

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506724A (en) * 1945-10-02 1950-05-09 Weatherhead Co Expansion valve
US2805039A (en) * 1953-05-28 1957-09-03 Henry W Angelery Statically and dynamically balanced pressure actuated valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506724A (en) * 1945-10-02 1950-05-09 Weatherhead Co Expansion valve
US2805039A (en) * 1953-05-28 1957-09-03 Henry W Angelery Statically and dynamically balanced pressure actuated valve

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413819A (en) * 1966-05-09 1968-12-03 Hughes Aircraft Co Flow rate control for a joule-thomson refrigerator
US3457730A (en) * 1967-10-02 1969-07-29 Hughes Aircraft Co Throttling valve employing the joule-thomson effect
FR2165920A1 (en) * 1971-12-06 1973-08-10 Air Prod & Chem
FR2377588A1 (en) * 1977-01-13 1978-08-11 Hymatic Eng Co Ltd CRYOGENIC COOLING UNIT
US4152903A (en) * 1978-04-13 1979-05-08 Air Products And Chemicals, Inc. Bimaterial demand flow cryostat
FR2558938A1 (en) * 1984-01-26 1985-08-02 Hymatic Eng Co Ltd CRYOGENIC COOLING APPARATUS
US5548963A (en) * 1995-06-08 1996-08-27 Hughes Missile Systems Company Joule-Thompson cryostat for use with multiple coolants

Also Published As

Publication number Publication date
SE300741B (en) 1968-05-06

Similar Documents

Publication Publication Date Title
US3659783A (en) Temperature regulated flow control element for automotive air-conditioners
US5595065A (en) Closed cycle cryogenic refrigeration system with automatic variable flow area throttling device
US3817053A (en) Refrigerating system including flow control valve
US3457730A (en) Throttling valve employing the joule-thomson effect
US3667247A (en) Refrigeration system with evaporator outlet control valve
US4002039A (en) Self-regulating cryostat
US3037362A (en) Compound pressure regulating system for refrigeration
US2539062A (en) Thermostatic expansion valve
US4442680A (en) Pilot-operated pressure regulator valve
US3269140A (en) Temperature sensitive valve arrangement
US3413819A (en) Flow rate control for a joule-thomson refrigerator
US4028907A (en) Adjustable-Joule-Thomson cryogenic cooler with downstream thermal compensation
US3640091A (en) Valve arrangement to provide temperature level control at cryogenic temperature ranges
US2463951A (en) Refrigeration expansion valve
US3640086A (en) Refrigerant flow control employing plural valves
US2579034A (en) Multiple response override for thermal valves
US4237699A (en) Variable flow cryostat with dual orifice
US2781979A (en) Thermo-magnetic refrigerant valve
US5974808A (en) Cooling apparatus employing a pressure actuated Joule-Thomson cryostat flow controller
US5941086A (en) Expansion valve unit
US3585813A (en) Self-contained portable cooler
US2986015A (en) Refrigeration system control
US3213928A (en) Air conditioner damper control
US2410795A (en) Expansion valve
US2788639A (en) Condenser valve